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The Mitigation Impact Difference On AMD Ryzen 9 3900X vs. Intel Core i9 9900K Performance

Code compilation performance has only minimal differences with these newest x86_64 CPUs and their hardware mitigations.

Facebook's Hackbench Linux kernel scheduler test is one of the synthetic workloads showing a significant difference in performance.

Likewise, many of the GNU C Library (glibc) micro-benchmarks still records a difference on the Core i9 9900K and Ryzen 9 3900X.